Leaders of some of the world’s biggest economic powers will arrive in the Canadian Rockies on Sunday for a Group of Seven summit overshadowed by a widening war across the Middle East and U.S. President Donald Trump’s unresolved trade war with allies and rivals alike.

Israel and Iran exchanged fresh attacks early Sunday, with the Israeli Defence Forces (IDF) claiming an "extensive series of strikes" on the headquarters of the Iranian Defence Ministry and a nuclear project.

Follow live updates as Iran retaliates after Israel strikes nuclear facilities. Stay informed with real-time news and developments.

Rising tensions with Iran and fears of an Israeli strike prompted the U.S. to move some of its nonmilitary personnel out of the region.

The State Department told regional allies about Israel's plan to strike Iran, and indicated it wasn't a U.S. operation, four sources told CBS News.

Dual risks kept investors on edge ahead of markets reopening late on Sunday, from heightened prospects of a broad Middle East war to U.S.-wide protests against U.S. President Donald Trump that threatened more domestic chaos.

The United States is reportedly withdrawing nonessential personnel and family members from its embassies in Iraq, Bahrain, Kuwait and the United Arab Emirates.

The death toll is growing as Israel and Iran exchanged missile attacks for a third consecutive day on Sunday, and Israel is warning that worse is to come. Israel targeted Iran's Defense Ministry headquarters in Tehran and sites it alleged were associated with Iran's nuclear program,